por Sarason, Irwin G [autor] | Helier, Roberto [traductor] | Sarason, Irwin G. Abnormal psychology.
por Lesser, Gerald S [autor] | Helier, Roberto.
por Pool, Ithiel de Sola, 1917- [autor] | Noam, Eli M [compilador] | Helier, Roberto [traductor] | Pool, Ithiel de Sola, 1917-. Technologies without boundaries on telecommunications in a global age.